Tag: M.W=150-200

Perez-Mondragon, Alma Antonia published the artcileAdhesive resins with high shelf-life stability based on tetra unsaturated monomers with tertiary amines moieties, Product Details of C11H15NO2, the publication is Polymers (Basel, Switzerland) (2021), 13(12), 1944, database is CAplus and MEDLINE.

This work reports the use of two monomers with two tertiary amines and four methacrylic (TTME) or acrylic (TTAC) terminal groups as co-initiators in the formulation of exptl. resin adhesive systems. Both monomers were characterized by FT-IR and ¹H NMR spectroscopies. The control adhesive was formulated with BisGMA, TEGDMA, HEMA, and the binary system CQ-EDAB as a photo-initiator system. For the exptl. adhesives, the EDAB was completely replaced for the TTME or the TTAC monomers. The adhesives formulated with TTME or TTAC monomers achieved double bond conversion values close to 75%. Regarding the polymerization rate, materials formulated with TTME or TTAC achieved lower values than the material formulated with EDAB, giving them high shelf-life stability. The degree of conversion after shelf simulation was only reduced for the EDAB material. Ultimate tensile strength, translucency parameter, and micro-tensile bond strength to dentin were similar for control and exptl. adhesive resins. Due to their characteristics, TTME and TTAC monomers are potentially useful in the formulation of photopolymerizable resins for dental use with high shelf-life stability.

Polymers (Basel, Switzerland) published new progress about 10287-53-3. 10287-53-3 belongs to esters-buliding-blocks, auxiliary class Amine,Benzene,Ester, name is Ethyl 4-dimethylaminobenzoate, and the molecular formula is C11H15NO2, Product Details of C11H15NO2.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Han, Jun-Hua published the artcileTailored amino/hydroxyl bifunctional microporous organic network for efficient stir bar sorptive extraction of parabens and flavors from cosmetic and food samples, Quality Control of 103-26-4, the publication is Journal of Chromatography A (2021), 462521, database is CAplus and MEDLINE.

As an effective sample pretreatment approach, stir bar sorptive extraction (SBSE) has shown great prospects in static microextraction and selective enrichment. In this work, bifunctional microporous organic network (B-MON) with the coexistence of amino and hydroxyl groups was firstly designed and synthesized as a novel coating for efficient SBSE of parabens and flavors in combination with high-performance liquid chromatog. coupled with photodiode array detection (HPLC-PDA). Linked by covalent bonds to form an extension of the aromatic ring skeleton, B-MON was a tailored adsorbent featured by porous structure and abundant hydrogen bonding sites for analytes with benzene/naphthalene rings and -OH/-COOH groups. The extraction and desorption parameters were evaluated in detail. Under the optimized conditions, the proposed B-MON-SBSE-HPLC-PDA method offered good linearity (0.10-100μg L-1) with correlation coefficients R2 ≥ 0.995, low limits of detection (0.010-0.035μg L-1) and limits of quantification (0.035-0.115μg L-1), and favorable enrichment factors (40-49). Furthermore, the developed method has been applied to the anal. of parabens and flavors in cosmetic and food samples with recoveries ranging from 80.4 to 109.6%. This method was also feasible to extract the analytes with benzene/naphthalene rings and -OH/-COOH groups, such as the plant growth regulators and non-steroidal anti-inflammatory drugs. The present study provided a new way to synthesize bifunctional MONs for SBSE of trace analytes in complex samples.

Journal of Chromatography A published new progress about 103-26-4. 103-26-4 belongs to esters-buliding-blocks, auxiliary class Alkenyl,Benzene,Ester,Protease,Tyrosinase,Natural product, name is Methyl 3-phenyl-2-propenoate, and the molecular formula is C10H10O2, Quality Control of 103-26-4.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Gluchowski, Artur published the artcileFresh Basil Infusion: Effect of Sous-Vide Heat Treatment on Their Volatile Composition Profile, Sensory Profile, and Color, Computed Properties of 103-26-4, the publication is Molecules (2022), 27(1), 5, database is CAplus and MEDLINE.

Herbs, including basil, are used to enhance the flavor of food products around the world. Its potential is influenced by the quality of fresh herbs and processing practices, wherein conditions of heat treatment play an important role. The aim of the research was to determine the effect of sous-vide heat treatment on the volatile compounds profile, sensory quality, and color of basil infusions. The material used for research was aqueous basil infusion prepared conventionally at 100°C, and using the sous-vide method (65, 75, and 85°C). The composition of volatile compounds was identified by GC/MS anal., the sensory profile was assessed using a group of trained panelists, while the color was instrumentally assessed in the CIE Lab system. No significant differences were found in the intensity of the taste and aroma of basil infusions at different temperatures Seventy headspace volatile compounds were identified in the analyzed samples, ten of which exceeded 2% of relative area percentage. The most abundant compounds were eucalyptol (27.1%), trans-ocimene (11.0%), β-linalool (9.2%), and β-myrcene (6.7%). Most of the identified compounds belonged to the terpenes and alcs. groups. Our findings show that the conventional herbal infusion was more like a sous-vide infusion prepared at the lowest temperature SV65, while SV75 and SV85 were similar to each other but different from the conventional. However, a smaller number of volatile compounds in the samples heated at higher temperatures of sous-vide were identified. The sous-vide samples showed a higher content of alkanes. The sous-vide method (p ≤ 0.05) resulted in darker, less green, and less yellow basil leaves than fresh and traditionally steeped ones. Long heat treatment under vacuum at higher temperatures causes a pronounced change in the aroma composition

Molecules published new progress about 103-26-4. 103-26-4 belongs to esters-buliding-blocks, auxiliary class Alkenyl,Benzene,Ester,Protease,Tyrosinase,Natural product, name is Methyl 3-phenyl-2-propenoate, and the molecular formula is C10H10O2, Computed Properties of 103-26-4.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Vaghi, Luca published the artcilePHANE-TetraPHOS, the First D₂ Symmetric Chiral Tetraphosphane. Synthesis, Metal Complexation, and Application in Homogeneous Stereoselective Hydrogenation, HPLC of Formula: 617-52-7, the publication is European Journal of Organic Chemistry (2021), 2021(17), 2367-2374, database is CAplus.

PHANE-TetraPHOS, a new D₂ sym. tetraphosphane based on the [2.2]paracyclophane scaffold, was synthesized and characterized. The peculiarity of this system was the presence of four homotopic diphenylphosphane groups, exchangeable through C₂ symmetry operations and consequently indistinguishable. Their spatial arrangement allows the simultaneous complexation of two metal atoms. Enantiomeric purity were attained at tetra-phosphane oxide level by fractional crystallization of the diastereomeric adducts obtained from the racemate with enantiopure dibenzoyltartaric acids. Alk. treatment of diastereomerically pure adducts followed by exhaustive P-O groups reduction with HSiCl₃ gave both PHANE-TetraPHOS antipodes in an enantiopure state. They were tested as rhodium ligands in the homogeneous enantioselective hydrogenation of some benchmark unsaturated compounds Catalytic activity and enantiodiscrimination ability were found comparable to those exhibited by the complexes of the parent bidentate ligand PHANEPHOS, but only half a mole of precious chiral ligand were employed.

European Journal of Organic Chemistry published new progress about 617-52-7. 617-52-7 belongs to esters-buliding-blocks, auxiliary class Alkenyl,Aliphatic hydrocarbon chain,Ester, name is Dimethyl itaconate, and the molecular formula is C5H10N2OS, HPLC of Formula: 617-52-7.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Durrani, Timur published the artcileSolvent-based paint and varnish removers: a focused toxicologic review of existing and alternative constituents, Application In Synthesis of 627-93-0, the publication is Journal of Applied Toxicology (2020), 40(10), 1325-1341, database is CAplus and MEDLINE.

Paint and varnish removers constitute a major potential source of organic solvent exposure to contractors and home improvement enthusiasts. Unfortunately, the leading paint remover formulations have traditionally contained, as major ingredients, chems. classified as probable human carcinogens (eg, methylene chloride) or reproductive toxicants (eg, N-methylpyrrolidone). In addition, because of its unique toxicol. (ie, hepatic conversion to carbon monoxide compounding generic solvent narcosis and arrythmogenesis), high volatility, and rigorous requirements for personal protective equipment, methylene chloride exposures from paint removers have been linked to numerous deaths involving both occupational and consumer usage. The aim of this review is to summarize the known toxicol. of solvent-based paint remover constituents (including those found in substitute formulations) in order to provide health risk information to regulators, chem. formulators, and end-users of this class of products, and to highlight any data gaps that may exist.

Journal of Applied Toxicology published new progress about 627-93-0. 627-93-0 belongs to esters-buliding-blocks, auxiliary class Ploymers, name is Dimethyl adipate, and the molecular formula is C8H14O4, Application In Synthesis of 627-93-0.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Joseph Srinivasan, Shiny published the artcileE. coli Nickel-Iron Hydrogenase 1 Catalyses Non-native Reduction of Flavins: Demonstration for Alkene Hydrogenation by Old Yellow Enzyme Ene-reductases, HPLC of Formula: 617-52-7, the publication is Angewandte Chemie, International Edition (2021), 60(25), 13824-13828, database is CAplus and MEDLINE.

A new activity for the [NiFe] uptake hydrogenase 1 of Escherichia coli (Hyd1) is presented. Direct reduction of biol. flavin cofactors FMN and FAD is achieved using H₂ as a simple, completely atom-economical reductant. The robust nature of Hyd1 is exploited for flavin reduction across a broad range of temperatures (25-70°C) and extended reaction times. The utility of this system as a simple, easy to implement FMNH₂ or FADH₂ regenerating system is then demonstrated by supplying reduced flavin to Old Yellow Enzyme “ene-reductases” to support asym. alkene reductions with up to 100% conversion. Hyd1 turnover frequencies up to 20.4 min^-1 and total turnover numbers up to 20 200 were recorded during flavin recycling.

Angewandte Chemie, International Edition published new progress about 617-52-7. 617-52-7 belongs to esters-buliding-blocks, auxiliary class Alkenyl,Aliphatic hydrocarbon chain,Ester, name is Dimethyl itaconate, and the molecular formula is C7H10O4, HPLC of Formula: 617-52-7.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Ortiz, Pablo published the artcileCopper-Catalyzed Enantioselective Alkylation of Enolizable Ketimines with Organomagnesium Reagents, Category: esters-buliding-blocks, the publication is Angewandte Chemie, International Edition (2017), 56(11), 3041-3044, database is CAplus and MEDLINE.

Inexpensive and readily available organomagnesium reagents were used for the catalytic enantioselective alkylation of enolizable N-sulfonyl ketimines [e.g., I + HexMgBr → II (71% yield, 74% ee)]. The low reactivity and competing enolization of the ketimines was overcome by the use of a copper-phosphine chiral catalyst, which also rendered the transformation highly chemoselective and enantioselective for a broad range of ketimine substrates.

Angewandte Chemie, International Edition published new progress about 1877-71-0. 1877-71-0 belongs to esters-buliding-blocks, auxiliary class Carboxylic acid,Benzene,Ester, name is 3-(Methoxycarbonyl)benzoic acid, and the molecular formula is C9H8O4, Category: esters-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Serafini, Marta published the artcileStore-Operated Calcium Entry as a Therapeutic Target in Acute Pancreatitis: Discovery and Development of Drug-Like SOCE Inhibitors, Product Details of C9H8O4, the publication is Journal of Medicinal Chemistry (2020), 63(23), 14761-14779, database is CAplus and MEDLINE.

Store-operated calcium entry (SOCE) is important in the maintenance of calcium homeostasis and alterations in this mechanism are responsible for several pathol. conditions, including acute pancreatitis. Since the discovery of SOCE, many inhibitors have been identified and extensively used as chem. probes to better elucidate the role played by this cellular mechanism. Nevertheless, only a few have demonstrated drug-like properties so far. Here, we report a class of biphenyl triazoles among which stands out a lead compound, 34, that is endowed with an inhibitory activity at nanomolar concentrations, suitable pharmacokinetic properties, and in vivo efficacy in a mouse model of acute pancreatitis.

Journal of Medicinal Chemistry published new progress about 1877-71-0. 1877-71-0 belongs to esters-buliding-blocks, auxiliary class Carboxylic acid,Benzene,Ester, name is 3-(Methoxycarbonyl)benzoic acid, and the molecular formula is C18H14BrNO5S2, Product Details of C9H8O4.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Chen, Hongyan published the artcileSize-controllable synthesis of dendritic porous silica as reinforcing fillers for dental composites, Recommanded Product: Ethyl 4-dimethylaminobenzoate, the publication is Dental Materials (2021), 37(6), 961-971, database is CAplus and MEDLINE.

Porous materials, especially porous silica particles are of great interest in different areas, and have applied in dental composites as inorganic fillers, due to their potential in constructing micromech. interlocking at the filler-resin matrix interfaces. However, the facile and precise synthesis of hierarchical porous silica with graded sizes is still a great challenge.Here, we synthesized dendritic porous silica (DPS) with center-radial hierarchical pores and controllable size ranging from 75 to 1000 nm by varying simultaneously the amounts of silica precursor and template in the microemulsion. A plausible nucleation-growth mechanism for the structural formation and the size tunability of the DPS particles was further put forward. These DPS particles were then formulated with Bis-GMA/TEGDMA resin.The particle size and morphol. influenced the mech. properties of dental composites. Particularly, DPS-500 particles (average size: 500 nm) exhibited the superior reinforcing effect, giving large improvements of 32.0, 96.7, 51.9, and 225.6% for flexural strength (SF), flexural modulus (EY), compressive strength (SC), and work of fracture (WOF), resp., over the DPS-75 filled composite. All DPS filler sized exhibited similar degree of conversions and curing depths. Furthermore, the DPS-500 filled composite presented better cytocompatibility than com. Z250 XT.The facile synthesis of DPS particles developed here and the understanding of the influence of the filler size and morphol. on the composite properties provide a shortcut to design porous silica with precise size control and dental composites with superior performance. These DPS particles could also have promising applications in biomedicine, catalysis, adsorption, and cancer therapy.

Dental Materials published new progress about 10287-53-3. 10287-53-3 belongs to esters-buliding-blocks, auxiliary class Amine,Benzene,Ester, name is Ethyl 4-dimethylaminobenzoate, and the molecular formula is C11H15NO2, Recommanded Product: Ethyl 4-dimethylaminobenzoate.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Yang, Ji published the artcileEfficient Palladium-Catalyzed Carbonylation of 1,3-Dienes: Selective Synthesis of Adipates and Other Aliphatic Diesters, Product Details of C8H14O4, the publication is Angewandte Chemie, International Edition (2021), 60(17), 9527-9533, database is CAplus and MEDLINE.

The dicarbonylation of 1,3-butadiene to adipic acid derivatives offers the potential for a more cost-efficient and environmentally benign industrial process. However, the complex reaction network of regioisomeric carbonylation and isomerization pathways, make a selective and direct transformation particularly difficult. Here, we report surprising solvent effects on this palladium-catalyzed process in the presence of 1,2-bis-di-tert-butylphosphin-oxylene (dtbpx) ligands, which allow adipate diester formation from 1,3-butadiene, carbon monoxide, and methanol with 97% selectivity and 100% atom-economy under scalable conditions. Under optimal conditions a variety of di- and triesters from 1,2- and 1,3-dienes can be obtained in good to excellent yields.

Angewandte Chemie, International Edition published new progress about 627-93-0. 627-93-0 belongs to esters-buliding-blocks, auxiliary class Ploymers, name is Dimethyl adipate, and the molecular formula is C8H11BO3, Product Details of C8H14O4.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics